Home / 5,190.39-7,785.78-2,071.89

Finding the Fourth Proportional to 5,190.39, 7,785.78 and 2,071.89

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Solution

The fourth proportional to 5,190.39, 7,785.78 and 2,071.89 is: 3,107.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.39 : 7,785.78 = 2,071.89 : x
  2. Step 2: Convert to fraction form
    5,190.39/7,785.78 = 2,071.89/x
  3. Step 3: Cross multiply
    5,190.39x = 7,785.78 × 2,071.89
  4. Step 4: Simplify right side
    5,190.39x = 16,131,279.72
  5. Step 5: Solve for x
    x = 16,131,279.72/5,190.39
  6. Step 6: Final answer
    x = 3,107.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.